package com.media.system.security.config;

import com.media.system.security.filter.JwtAuthenticationTokenFilter;
import com.media.system.security.handle.AuthenticationEntryPointImpl;
import com.media.system.security.handle.LogoutSuccessHandlerImpl;
import com.media.system.security.service.UserDetailsServiceImpl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.HttpMethod;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.authentication.AuthenticationProvider;
import org.springframework.security.authentication.dao.DaoAuthenticationProvider;
import org.springframework.security.config.annotation.authentication.configuration.AuthenticationConfiguration;
import org.springframework.security.config.annotation.method.configuration.EnableMethodSecurity;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configurers.AbstractHttpConfigurer;
import org.springframework.security.config.http.SessionCreationPolicy;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.crypto.password.PasswordEncoder;
import org.springframework.security.web.SecurityFilterChain;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;
import org.springframework.web.cors.CorsConfiguration;
import org.springframework.web.cors.CorsConfigurationSource;
import org.springframework.web.cors.UrlBasedCorsConfigurationSource;

import java.util.Arrays;
import java.util.Collections;

/**
 * Spring Security配置
 * 
 * @author Claude
 * @since 2024-01-20
 */
@Configuration
@EnableWebSecurity
@EnableMethodSecurity(prePostEnabled = true, securedEnabled = true)
public class SecurityConfig {

    @Autowired
    private UserDetailsServiceImpl userDetailsService;

    @Autowired
    private AuthenticationEntryPointImpl unauthorizedHandler;

    @Autowired
    private LogoutSuccessHandlerImpl logoutSuccessHandler;

    @Autowired
    private JwtAuthenticationTokenFilter jwtAuthenticationTokenFilter;

    /**
     * 身份验证实现
     */
    @Bean
    public AuthenticationProvider authenticationProvider() {
        DaoAuthenticationProvider authProvider = new DaoAuthenticationProvider();
        authProvider.setUserDetailsService(userDetailsService);
        authProvider.setPasswordEncoder(passwordEncoder());
        return authProvider;
    }

    /**
     * 强散列哈希加密实现
     */
    @Bean
    public PasswordEncoder passwordEncoder() {
        return new BCryptPasswordEncoder(12);
    }

    /**
     * 身份验证管理器
     */
    @Bean
    public AuthenticationManager authenticationManager(AuthenticationConfiguration config) throws Exception {
        return config.getAuthenticationManager();
    }

    /**
     * anyRequest          |   匹配所有请求路径
     * access              |   SpringEl表达式结果为true时可以访问
     * anonymous           |   匿名可以访问
     * denyAll             |   用户不能访问
     * fullyAuthenticated  |   用户完全认证可以访问（非remember-me下自动登录）
     * hasAnyAuthority     |   如果有参数，参数表示权限，则其中任何一个权限可以访问
     * hasAnyRole          |   如果有参数，参数表示角色，则其中任何一个角色可以访问
     * hasAuthority        |   如果有参数，参数表示权限，则其权限可以访问
     * hasIpAddress        |   如果有参数，参数表示IP地址，如果用户IP和参数匹配，则可以访问
     * hasRole             |   如果有参数，参数表示角色，则其角色可以访问
     * permitAll           |   用户可以任意访问
     * rememberMe          |   允许通过remember-me登录的用户访问
     * authenticated       |   用户登录后可访问
     */
    @Bean
    public SecurityFilterChain filterChain(HttpSecurity httpSecurity) throws Exception {
        return httpSecurity
                // CSRF禁用，因为不使用session
                .csrf(AbstractHttpConfigurer::disable)
                // 认证失败处理类
                .exceptionHandling(exception -> exception
                        .authenticationEntryPoint(unauthorizedHandler))
                // 基于token，所以不需要session
                .sessionManagement(session -> session
                        .sessionCreationPolicy(SessionCreationPolicy.STATELESS))
                // 过滤请求
                .authorizeHttpRequests(authz -> authz
                        // 对于登录login 注册register 验证码captcha 允许匿名访问
                        .requestMatchers("/auth/login", "/auth/register", "/auth/captcha").permitAll()
                        // 静态资源，可匿名访问
                        .requestMatchers(HttpMethod.GET, "/", "/*.html", "/**/*.html", "/**/*.css", "/**/*.js", "/profile/**").permitAll()
                        .requestMatchers("/swagger-ui.html", "/swagger-resources/**", "/webjars/**", "/*/api-docs", "/druid/**").permitAll()
                        // 健康检查接口
                        .requestMatchers("/actuator/**").permitAll()
                        // 文档接口
                        .requestMatchers("/doc.html", "/favicon.ico", "/error").permitAll()
                        // 除上面外的所有请求全部需要鉴权认证
                        .anyRequest().authenticated())
                // 添加Logout filter
                .logout(logout -> logout
                        .logoutUrl("/auth/logout")
                        .logoutSuccessHandler(logoutSuccessHandler))
                // 添加CORS
                .cors(cors -> cors.configurationSource(corsConfigurationSource()))
                // 添加JWT filter
                .addFilterBefore(jwtAuthenticationTokenFilter, UsernamePasswordAuthenticationFilter.class)
                .build();
    }

    /**
     * 跨域配置
     */
    @Bean
    public CorsConfigurationSource corsConfigurationSource() {
        CorsConfiguration configuration = new CorsConfiguration();
        configuration.setAllowedOriginPatterns(Collections.singletonList("*"));
        configuration.setAllowedMethods(Arrays.asList("GET", "POST", "PUT", "DELETE", "OPTIONS"));
        configuration.setAllowedHeaders(Collections.singletonList("*"));
        configuration.setAllowCredentials(true);
        configuration.setMaxAge(3600L);
        
        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
        source.registerCorsConfiguration("/**", configuration);
        return source;
    }
}